Improvement in glass-furnaces



3 Sheets--Sheet 3.

A.FDGHERON.

Glass-Furnaces.

Patented August 12, 1873.

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AM. Pf/o ro-umos/MPH/c CQ fix (osaomvefs moefss) A UNITED S'IATES PATENTOFFICE. i

ANTOINE POGHERON, OF PARIS, FRANCE, A SSIGNOR TO EDWIN CANNINGTON.

IMPROVEMENT IN GLASS-FURNACES.

Specification forming part of Letters Patent No. 141,666, dated August12, 1873 application filed May 29, 1873.

To all whom t may concern:

Be it known that I, ANTOINE PooHERoN, of N o. 15 Passage des PetitesEcuries, Paris, a citizen of the French Republic, glass-manufacturer,have invented or discovered new and useful Improvements in theManufacture of Glass; and I, the said ANTOINE PooHERoN, do herebydeclare the nature of the said invention and in what manner the same isto be performed to be particularly described and ascertained in and bythe following` statement thereof-that is to sayi My improvements relateto melting or fus ing furnaces, such as are now used in glassmaking, andhave reference to the suppression of the lire-clay pots or crucibleshitherto in use, and to placing the materials to be fused or meltedwithin the furnace itself, the usual inner form of the lower part ofwhich is modied by doing away with the sieges or banks and the generalleveling of the bottom, t0A which, separately, I make no claim; butaccording to my invention the sides are constructed of a hollow form insuch wise that a current of refrigerating or cooling air may circulateand prevent any excessive heating of the sides which are to retain orinclose the materials in fusion.

My improvements will be thoroughly understood by reference to theaccompanying sheets of drawings, which represent my improved furnace orkiln.

A indicates the basin or tank which is to contain the materials infusion B, Ere-places; C, sills between the basin and the fire-places.These sills are made by the aid of two rebrick walls, united at theirsummits so as to establish between them a vacant space, D, which is toserve for the current of refrigeratin g air. E, free space, passing allround the basin or tank between the exterior walls and the inner wallsor sides ofthe basin, and communicating with the space D between thesills for the circulation of cold air; F, bottom of the basin, supportedby iron-work, G, crown or arch of the furnace; H, arches over thefireplaces B, which fire-places are substituted for the fire-gratesusually employed in the body of the furnace, beneath the crown or archGr, where the tank A is now forme/d 5 t', workingholes; L, chimney; M,cave or tunnel from which air is admitted to the fires. la a arepassages admitting air to ascend from the cave between the double wallsof the fireplaces B. The air thus heated passes, by passages a a in thearches H, into the body of the furnace under the arch G, and, togetherwith the products of combustion and air entering the furnace at otherpoints, it escapes through the working-holesc into the chim'neyL.

Figure l is a longitudinal section of my improved furnace or kiln. Thepassages a are clearly seen in Fig. 2, which is a transverse sectiontaken on the line l l in Fig. l. b b are other passages from the cave,which ad mit air to circulate in channels formed in the bed of the tank,as is seen at Fig. 3,` which isa horizontal section taken on the line 22 in Fig. l. rIhe air thus heated issues at openings b', and, meetingthe gases entering the body of the furnace from the fire-places H,effects their perfect combustion. c c are passages, by which air fromthe glass-house in which the furnace stands is able to pass between thetwo walls of the sills O through the space D. These passages are clearlyseen atV Fig. 4,

which is a horizontal section taken on the line 3 3 in Fig. 1. E E areair-channels in communication with the passages c, and complet ing thecircuit around the furnace.

Fig. 5 is a horizontal section taken on thev line 4 4 in Fig. l. c c aredampers to regulate the quantity of air passing through the sills. Bythese dampers the temperature of the sills can be controlled, so as toprevent it becoming either too high or too low.

Fig. 6 is a transverse section taken through the center of the furnace,and Fig. 7/ is a side elevation of the same.

By the method herein described and illustrated on the annexed drawingsno pots or crucibles are used; consequently all expense in this respectis done away with. There is a considerable saving `of fire-bricks in theconstruction of my new furnaces, no more deceptions in the calculationsof the glass-maker, quicker fusions, more len gthened working, and nomore disasters. In fact, all the defects of the old furnaces are removedand a saving of from fifty to sixty per cent. in fuel is effected.

Having thus described the nature of my said invention, and the manner ofperforming the same, I claim as my invention- I l. rIhe combination, inglass-furnaces, ot'

the following parts, viz: The tank for holding the glass,the lire-placesarranged externally to the said tank, the air-passages in the Walls ofthe tank, the arch surmonnting the tank, and perforated withWorking-holes, and the chimney inclosing the said arch and receiving theproducts of combustion from the Workin g-holes, all substantially asbefore set forth. y 2. rlhe combination of the following parts, viz: Thetank for holding the glass, the replaces arranged externally to saidtank, the

air-passages in the Walls of the said fire-places, the internal archesof the said fire-places, the arch surlnounting the said tank, andperforated Wth Working-holes, and the chimney inclosing the said arch,all substantially as before set forth.

ANTOINE POCHERON.

Witnesses M. SAUMELLY, P. GAUssUY.

